Bleach is old tech and no longer works with todays sophisticated testing. Most labs now perform integrity checks on the sample prior to the actual toxin check. Many of these integrity checks now include testing for the presence of bleach. This is done with dipsticks similar to the ones found here:
http://www.meditests.com/drugadtes.html

Why not substitute with a clean sample from a freind, or a family member? Even children of stoner aquaintances make excellent sub donors. If you are brave enough to sneak in some bleach, then you certainly are brave enough to sneak in a substituted sample.
Burnt Toast Reviewed by Burnt Toast on . Bleach or any house hold items Hey everyone, I m getting tested pretty soon by the parents with one of those "At Home" tests. I was wondering if there is anything that I can put in it to produce a false negative, anything. I will take it alone. Thanks, I just need any response. Rating: 5